4x^2-9x=-25

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Solution for 4x^2-9x=-25 equation:


Simplifying
4x2 + -9x = -25

Reorder the terms:
-9x + 4x2 = -25

Solving
-9x + 4x2 = -25

Solving for variable 'x'.

Reorder the terms:
25 + -9x + 4x2 = -25 + 25

Combine like terms: -25 + 25 = 0
25 + -9x + 4x2 = 0

Begin completing the square.  Divide all terms by
4 the coefficient of the squared term: 

Divide each side by '4'.
6.25 + -2.25x + x2 = 0

Move the constant term to the right:

Add '-6.25' to each side of the equation.
6.25 + -2.25x + -6.25 + x2 = 0 + -6.25

Reorder the terms:
6.25 + -6.25 + -2.25x + x2 = 0 + -6.25

Combine like terms: 6.25 + -6.25 = 0.00
0.00 + -2.25x + x2 = 0 + -6.25
-2.25x + x2 = 0 + -6.25

Combine like terms: 0 + -6.25 = -6.25
-2.25x + x2 = -6.25

The x term is -2.25x.  Take half its coefficient (-1.125).
Square it (1.265625) and add it to both sides.

Add '1.265625' to each side of the equation.
-2.25x + 1.265625 + x2 = -6.25 + 1.265625

Reorder the terms:
1.265625 + -2.25x + x2 = -6.25 + 1.265625

Combine like terms: -6.25 + 1.265625 = -4.984375
1.265625 + -2.25x + x2 = -4.984375

Factor a perfect square on the left side:
(x + -1.125)(x + -1.125) = -4.984375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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